Sending `insertMany()` and `createCollection()` with timeseries concurrently results in collection without timeseries

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    • Type: Question
    • Resolution: Gone away
    • Priority: Minor - P4
    • None
    • Affects Version/s: 4.8.0
    • Component/s: None
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    • Not Needed
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      Consider the following script:

      const { MongoClient } = require('mongodb');

void async function main() {
  const client = await MongoClient.connect('mongodb://localhost:27017/test');

  const p1 = client.db().createCollection('User', {
    timeseries: {
      timeField: 'timestamp',
      metaField: 'metadata',
      granularity: 'hours',
    }
  });

  await new Promise(resolve => setTimeout(resolve, 0));

  const p2 = client.db().collection('User').insertMany([{ name: 'test' }]);

  await Promise.all([p1, p2]);
  console.log(await client.db().listCollections().toArray());
}();

      Right now it errors out with:

      /home/val/Workspace/MongoDB/mongoose/node_modules/mongodb/lib/cmap/connection.js:210
                    callback(new error_1.MongoServerError(document));
                             ^

MongoServerError: Cannot create collection test.User - collection already exists.
    at Connection.onMessage (/home/val/Workspace/MongoDB/mongoose/node_modules/mongodb/lib/cmap/connection.js:210:30)

      I would intuitively expect this script to successfully create a timeseries collection since the `createCollection()` is sent off first. I realize this is probably a server issue rather than a Node driver issue, but I figured I'd ask here first in case I missed somewhere in the documentation that you're expected to call `createCollection()` before sending any operations if creating a timeseries collection.

            Assignee:
            Bailey Pearson
            Reporter:
            Valeri Karpov
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              Created:
              Updated:
              Resolved: